A compound ‘ X ’ on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound ‘ Y ’. ‘ X ’ also reacts with sodium metal to evolve a colourless gas ‘ Z ’. Identify ‘ X ’, ‘ Y ’ and ‘ Z ’. Write the equation of the chemical reaction of formation of ‘ Y ’ and also write the role of sulphuric acid in the reaction.

Compound X is CH 3 CH 2 OH -ethanol, which on heating with concentrated sulphuric acid at 443 K gives ethene, which is an unsaturated compound. Ethanol reacts with sodium metal to produce sodium ethoxide and hydrogen gas ' Z '. CH 3 CH 2 OH + Na → CH 3 CH 2 ONa + H 2 Chemical reaction of formation of Y is, CH 3 CH 2 OH Ethanol → 443 K Conc . H 2 SO 4 CH 2 = CH 2 Ethene + H 2 O Here, concentrated sulphuric acid acts as a dehydrating agent, it removes water molecule from ethanol.

What is the difference between soaps and detergents?

Soap Detergent 1. It is sodium or potassium salt of Carboxylic acids. 1. It is ammonium or sodium sulphonate salt of hydrocarbons. 2. Soaps are bio-degradable. 2. Some detergents are non- biodegradable. 3. Soaps do not lather in hard water. 3. Detergent lather well in hard water. 4. Weak cleansing action. 4. Have strong cleansing action.

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Science Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Carbon and its Compounds>Exercise>Q 16

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How many electron pairs are shared between two nitrogen atoms in a molecule of nitrogen?

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Important Questions on Carbon and its Compounds

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Science Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Carbon and its Compounds>Exercise>Q 17

Number of valence electrons in carbon is

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Science Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Carbon and its Compounds>Exercise>Q 18

Graphene is one atom layer thick layer of carbon obtained from

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Science Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Carbon and its Compounds>Exercise>Q 19

Covalent bond is formed by _____.

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Science Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Carbon and its Compounds>Exercise>Q 20

Allotropy is the characteristics of:-

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Science Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Carbon and its Compounds>Exercise>Q 21

The bond between two carbon atoms in acetylene molecule is _____.

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Science Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Carbon and its Compounds>Exercise>Q 22

Choose the correct statement.
(i) Saturated hydrocarbons contain single bonds only.
(ii) Saturated hydrocarbons may have a double bond between carbon atoms.
(iii) All alkenes are saturated hydrocarbons.
(iv) Alkenes show homologous series.

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Science Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Carbon and its Compounds>Exercise>Q 23

Identify the statement that is incorrect about alkanes.

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Science Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Carbon and its Compounds>Exercise>Q 24

Combustion of hydrocarbon is generally accompanied by the evolution of